Here's the Behind the scene:
Now in Blender, let me point this out, if you know you wanna render some objects with lighting passing through, or with a lot of caustics, then do not use the Evee engine to render your work, cause to optimize file sizes and ram usage the Evee engine in blender don't usually take lighting, Unlike the cycles render engine, which support caustics and ever type of light you throw at it, but now a days blender artist are coming up with ways to fool Evee engine into creating light and shadow, so the rendering wont be heavy.
